Fountain pen



FIG. 1 is a front view of the fountain pen;

FIG. 2 is a rear view of the fountain pen;

FIG. 3 is a side view of the fountain pen, from the bottom of FIG. 1;

FIG. 4 is a side view of the fountain pen, from the top of FIG. 1;

FIG. 5 is a perspective view of the fountain pen;

FIG. 6 is an end view from the right of FIG. 1; and,

FIG. 7 is an end view from the left of FIG. 1.

The broken line showing of the nib is for illustrative purposes only, and forms no part of the claimed design. 

The ornamental design for a fountain pen, as shown and described. 